Two men were stabbed, and one was critically injured, on Sunday inside a Brooklyn grocery store, police said.

The men, ages 28 and 33, were ordering food at Blessed Mini Market Deli Grocery Corp. on Fulton Street near Tompkins Avenue in Bedford-Stuyvesant around 4:45 a.m. when two men approached and began arguing with them, cops and police sources said.

The 33-year-old was critically injured when he was stabbed once in the chest. Meanwhile, the younger victim was seriously injured when he was stabbed once in the neck and three times in the back, police sources said.

A surveillance camera inside the bodega caught the stabbing — and the bloody aftermath, photographs show.

“One guy got stabbed in the back,” one of the store workers said. “They were fighting — always fighting.“

Both victims were taken to Kings County Hospital, police said.

Two men were taken into custody shortly thereafter, but were not immediately charged.